Sewing-machine throat-plate.



E. PHANEUP.

SEWING MACHINE THROAT PLATE.

APPLIUATION FILED, NOV. 15, 1912.

1,092,858., Patented Apr. 14, 1914 E Lphege Phaneuj.

Witnesses: Inventor COLUMBIA PLANOGRAPH co wAsHlNnTufi. D, C.

ELPI-IEG-E PHANEUF, OF ST. I-IYACINTHE, QUEBEC, CANADA.

SEWING-MACHINE THROAT-PLATE.

Specification of Letters Patent.

Patented Apr. 1st, 1914.

Application filed November 15, 1912. Serial No. 731,473.

To all whom it may concern:

Be it known that I, ELPHEGE PHANEUr, a subject of the King of Great Britain, residing at 111 Girouard street, St. Hyacinthe, Province of Quebec, Canada, have invented certain new and useful Improvements in Sewing-Machine Throat-Plates; and I do hereby declare that the following is a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The invention to be hereinafter described relates to sewing machine throat plates.

In order to more clearly disclose the construction, operation, and use of the invention, reference should be had tothe accom panying drawings forming part of the present application.

Throughout the several figures of the drawings like reference characters designate the same parts.

In the drawings: Figure 1 is a top plan view of a plate embodying my invention; Fig. 2 is the same, showing a slightly modified form; Fig. 8 is a plan View of the inner face of the bottom plate of the device; Fig. 4 is a similar view of the top plate; Fig. 5 is a detail of the guide bars; Fig. 6 is the same, showing a slightly modified form; and Fig. 7 is a plan view of the inner face of a top plate used with the modified guide bars shown in Fig. 6.

This device is specially designed to permit the guide rods of a sewing machine throat plate to be quickly and cheaply replaced when they become worn or broken. The commoner form of throat plates now in use have the guide bars cast integral with the plate or cut separately in pairs and then forced into tight sockets in the plate by great pressure, so that when the guide rods become badly worn or are broken it becomes necessary to throw the plate away. As these plates are made of specially tempered steel and have to be very carefully made, this is a very expensive practice. As above stated my throat plate permits the guide rods to be replaced, thus providing means for great saving.

The breaking of the guide rods is especially true in machines doing heavy work, such as shoe sewing machinery, for which this plate is more especially intended; for in this class of work the move of the needle, great vibration of the machine, and heavy pressure of the pressure foot all combine to break the rods. This plate is composed of a heavy base plate 1 and a thin upper plate 2 held together by screws 3 counter sunk so far as to be flush with the upper face of the plate 1 and screwed into screw threaded perforations 4 in the base plate 1, in combination with short cylindrical rods 5 extending lengthwise across a rectangular opening 6 in the proximate transverse center of the plates, but a little nearer one end than the other, and having their ends seated in short semi-cylindrical grooves 7 and 7 in the inner face of the base plate 1 and of the top plate 2, respectively.

A counter sunk perforation 8 is provided through the two plates at each side and a little nearer one end thereof than the other, to receive counter sunk screws for the purpose of screwing the throat plate to the ordinary post or throat plate support.

The modified guide rods 5 shown in Fig. 6 have their ends cut away for a short distance so as to form short semi-cylindrical projections 5 adapted to be received by the semi-cylindrical grooves 7 of the base plate 1, their fiat upper faces being flush with the upper face of the said base plate. In this case it is obvious that no grooves are re quired or desired in the upper plate 2, so the grooves 7 of the above described form are omitted, as in Fig. 7

In the modified form shown in Fig. 2 the top plate 2 is very much smaller than the base plate 1, and set therein as shown.

It is thought that the construction, operation, and use of the invention will be clear from the preceding detailed description.

Changes may be made in the construction, arrangement, and disposition of the several parts of the invention without in any way departing from the field and scope of the same, and it is meant to include all such within this application wherein only. a preferred form has been disclosed.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent is:

1. A sewing machine throat plate consisting of two superposed plates, having corresponding openings of the same form and size, which form a single throat-opening and provided with pairs of registering grooves at the end of said openings, the said plates being also provided with registering screw holes and with screws which permit them to be clamped together accurately in the position stated, in combination with detachablerods adapted to extend in parallel lines across said opening, fitting into the grooves of said plates and securely held therein against lateral movement until said plates are separated.

2. A sewing machine throat plate consisting of two superposed plates having corresponding openings of the same form and size which form a single throat-opening and provided with pairs of registering grooves at the ends of said openings, the said plates being also provided with means permitting them. to be accurately clamped together in the position stated, in combinatlon with clelines across said opening, fitting into the grooves of said plates and securely held therein against lateral movement until said ELPHEGE PHANEUF.

Witnesses E. J. GAUVIN, A. BASTIEN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

- tacha-ble rods adapted to extend in parallel 

